20664268 has 12 divisors (see below), whose sum is σ = 36501192. Its totient is φ = 10235360.

The previous prime is 20664257. The next prime is 20664289. The reversal of 20664268 is 86246602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23713 + ... + 24568.

It is an arithmetic number, because the mean of its divisors is an integer number (3041766).

Almost surely, 2^20664268 is an apocalyptic number.

It is an amenable number.

20664268 is a deficient number, since it is larger than the sum of its proper divisors (15836924).

20664268 is a wasteful number, since it uses less digits than its factorization.

20664268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48392 (or 48390 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 20664268 is about 4545.7967398466. The cubic root of 20664268 is about 274.4142596153.

The spelling of 20664268 in words is "twenty million, six hundred sixty-four thousand, two hundred sixty-eight".